<template>
<div id="root">
		<div class="todo-container">
			<div class="todo-wrap">
				<MyHeader @addTodo="addTodo"/>
				<MyList :todos="todos" :checkTodo="checkTodo" :deleteTodo="deleteTodo"/>
				<!-- <MyFooter :todos="todos" @checkAllTodo="checkAllTodo" @clearAllTodo="clearAllTodo"/> -->
				<MyFooter :todos="todos" @checkAllTodo="checkAllTodo" @clearAllTodo="clearAllTodo"/>

			</div>
		</div>
	</div>
</template>

<script>
    //引入School组件
  import MyHeader from './components/MyHeader'
  import MyList from './components/MyList'
  import MyFooter from './components/MyFooter'

  export default {
    name: 'App',
    components:{MyHeader,MyList,MyFooter}, 
    
    data(){
      return {
		//默认显示的数据 true为勾选，false没有勾选
		todos:JSON.parse(localStorage.getItem('todos')) 
	 }
    },
    methods: {
      addTodo(todoObj) {
		//插入到最上面
        this.todos.unshift(todoObj)
      },
	 //是否勾选上
      checkTodo(id) {
		//便利todos  拿到todo 判断是否是勾选  如果是勾选则为true  否则为false
        this.todos.forEach((todo) => {
          if(todo.id === id ) todo.done = !todo.done
        })
      },
      //根据id去删除  filter过滤出的是新数组，将新数组的值赋值给老数组 完成过滤后的替换
      deleteTodo(id) {
        this.todos = this.todos.filter( todo => todo.id !== id)
      },
	  //全选 
      checkAllTodo(done) {
        this.todos.forEach((todo)=>{
          todo.done = done
        })
      },
	  //清楚所有选中的
      clearAllTodo() {
        this.todos = this.todos.filter((todo)=> {
          return !todo.done
        })
      }



    },
	watch :{
		todos: {
			deep:true,
			handler(value){
				localStorage.setItem('todos',JSON.stringify(value))
			}
		}
	}
  }
</script>

<style>
	/*base*/
	body {
		background: #fff;
	}
	.btn {
		display: inline-block;
		padding: 4px 12px;
		margin-bottom: 0;
		font-size: 14px;
		line-height: 20px;
		text-align: center;
		vertical-align: middle;
		cursor: pointer;
		box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 1px 2px rgba(0, 0, 0, 0.05);
		border-radius: 4px;
	}
	.btn-danger {
		color: #fff;
		background-color: #da4f49;
		border: 1px solid #bd362f;
	}
	.btn-danger:hover {
		color: #fff;
		background-color: #bd362f;
	}
	.btn:focus {
		outline: none;
	}
	.todo-container {
		width: 600px;
		margin: 0 auto;
	}
	.todo-container .todo-wrap {
		padding: 10px;
		border: 1px solid #ddd;
		border-radius: 5px;
	}
</style>
